E-210C with an error code of C-38

[Guest]

I keep getting this error code and it will not go to ready. Is this a board problem?

[Mr Spock]

black auto toner sensor fault

Is the harness between the LGC board and the EPU drawer connector open-circuited?
Is any harness inside the EPU or the auto-toner sensor harness open-circuited?
Is the auto-toner sensor connector or the connector J120 on the LGC board disconnected?
Reconnect the connector. Replace the harness.
1. Replace the auto-toner sensor.
2. Replace the LGC board.

You may need to replace the developer also.